Internal combustion engine



y 9, 1936. l. E/ASKE I I INTERNAL COMBUSTION ENGINE Filed July '25, 1934R m N m m 0M. w. w.

A TTORNE Y Patented May 19, 1936 2,040,915"

UNITED STATES PATENT OFFICE INTERNAL COMBUSTION ENGINE Irving E. Aske,Muskegon, Mich, assignor to Campbell Wyant and Cannon Foundry Company,Muskegon Heights, Mich., a. corporation of Michigan Application July 23,1934, Serial No. 736,477

2 Claims. (01. 123173) This invention relates to internal combustion a.higher compressed combustible charge than is engines, and particularlyto such engines wherein ordinarily possible is desired in order toobtain a a. combustible charge composed of air and a fuel higher poweroutput than heretofore with the vapor is compressed in the workingcylinder and usual compressed charge, but when the charge 5 combustionchamber of the engine, which comis compressed to six or more ratios, asevere bustion chamber is usually situated in'the cover detonation takesplace within the engine and it is of the cylinder and while compressed,the comtherefore not practical to employ compression bustible chargeignited. ratios greater than six without these detonation The inventionhas for its objects, first, an imknocks unless provision is providedwhereby the proved transfer of heat generated by the burnburning of thecharge as a whole is slowed; or a 10 ing charge of fuel in the cylinderand combustion means whereby the transfer of heat generated chamber tothe circulating medium surrounding by the burning charge is made morerapid than the cylinder barrel and combustion chamber; through castironas usually employed for the second, to increase the power output ofthe encovers of the cylinder and walls of the combusgine for a givenunit of fuel consumed; third, to tion chamber. Aluminum cylinder covershave 15 minimize detonation within the engine; and, been made andemployed. These aluminum fourth, a general improvement in the efliciencycovers answered fairly well for transferring the of the engine. heat ofcombustion to the cooling medium cir- These objects and other morespecific objects culated through the cover chamber but they hereinafterappearing are attained by, and the would not stand the strains imposedwhen the 20 invention finds preferable embodiment in the engine wasoperating under near full load output hereto attached specification anddescription, for a considerable period of time. In the present and asillustrated by the accompanying drawing, invention copper or itsequivalent in heat conin which: duction is employed which, it was found,could Fig. 1 is a View of the under side of a portion not be adequatelyjoined directly to the cast iron 25 of a cover showing a heat transferinsert in posiof the cover when the copper heat transfer insert tion.was placed in the mold and the cover cast onto Fig. 2 is a sectionalview taken on line X of it therefore. The bonding washer 5 is providedFigure 1. and the heat transfer insert cast onto and bonded Fig. 3 is aperspective view of the heat transfer to it. Then the insert is placedin the mold in 30 insert. which the cover is to be cast and the molteniron Fig. 4 is a perspective view of the bonding to form the cover runinto the mold and onto the washer before the heat transfer insert hasbeen heat transfer insert and bonding washer. By

cast onto it. this method it is found when the bonding washer In thedrawing similar characters refer to is of steel or the like, the heattransfer insert of 35 similar parts throughout the several views. copperor copper alloy and the cover of cast iron I represents a cylinder coverof an internal a perfect bond is obtained between the heat combustionengine; 2 the combustion chamber transfer insert and the bonding washer,also beand 3 that portion of the cover that lies directly tween thebonding washer and the cast iron of over the cylinder bore. 4 is theheat transfer the cover and. that a light, unleakable joint is 40insert, provided with a bonding washer 5. The obtained between thechamber in the cover and insert which is preferably made of copper orthe face of the cover. It has been found that other like material isprovided with serrations 6 with covers constructed in accordance withthis whereby the maximum area of the insert is preinvention thatcompression ratios of nine and sented to the circulating 'coolingmedium. The even ten to one are possible and that a consider- 45 heattransfer insert is preferably made in the able increase in power withoutdetonation is obform shown, having a flat head portion 1 pretained overthe usual construction of internal sented to the hot flame of combustionand a neck combustion engine. portion 9. The circulating cooling mediumis What is claimed, is:

contained in the chamber Ill. H represents a 1. A cylinder head forinternal combustion en- 50 conventional spark plug by which thecompressed gines, the said head comprising a body having a charge may beignited. This spark plug may be face for closing the end of thecylinder, a cooling dispensed with in Diesel engines. fluid chamber inspaced relation to the said face,

In cons d the bjects of this invention, it a heat transfer memberextending from said face is well known among com engineers that into thesaid cooling fluid chamber and a washer- 55 V V r 2,040,915 like memberembedded mm the wall of the body between the said face and the coolingfluid chamber and into the exterior of the heat transfer member for thepurpose specified.

2. In a cylinder cover for internal combustion engines, the said coverhaving a. face for closing the end of the cylinder and a cooling fluidchamber, a heat transfer member secured to the cover between the saidface and the cooling fluid chame her by a washer embedded into the heattransfer member and into the metal of the cover.

IRVING E. ASKE.

